We're releasing a new wallpaper into the wild today, our 10th in the collection. This one is drawn and colored up by our October guest blogger, Mr. Kristopher Kotcher (aka Frenemy). He's calling it, Explore the Universe, and we're calling it one of our favorite from the collection.

Sretan Bor is a master of the colored felt-tip marker pen. If you don't believe me, have a look at a feature we did on his sketchbook back in February 2011, titled Heavy Color.

Now he's back again, with this fresh hand-drawn wallpaper for all of you to enjoy. Download it free and make these captivating eyes part of your everyday. If you’d like to be notified when the next wallpaper is released, sign up to our newsletter.

Our first R-Rated wallpaper comes to us from Spaniard illustrator Amaia Arrazola. If you recall she was also our guest blogger for the month of February and killed it with 9 inspiring posts (read them here).